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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mamalis A. G., Petrov M. I., Balaev D. A., Shaihutdinov K. A., Gohfeld D. M., Militsyn S. V., Ovchinnikov S. G., Kirko V. I., Vottea I. N.
Заглавие : A DC superconducting fault current limiter using die-pressed YBa2Cu3O7 ceramic
Место публикации : Supercond. Sci. Technol.: IOP PUBLISHING LTD, 2001. - Vol. 14, Is. 6. - P413-416. - ISSN 0953-2048, DOI 10.1088/0953-2048/14/6/316
Примечания : Cited References: 14
Предметные рубрики: CURRENT-VOLTAGE CHARACTERISTICS
WEAK LINKS
COMPOSITES
Ключевые слова (''Своб.индексиров.''): current voltage characteristics--electric fault currents--high temperature applications--josephson junction devices--polycrystalline materials--fault current limiter devices--superconducting materials
Аннотация: A model of a superconducting fault current limiter on a polycrystalline high-temperature superconductor basis is checked in the dc short circuit regime. Protection of load takes place under the conditions described in this paper. The use of ceramic materials with superconducting-normal metal-superconducting Josephson junction network having an S-type current-voltage characteristic (CVC) is shown to be effective for fault current limiter devices.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yasinskiy A. S., Padamata S. K., Polyakov P. V., Shabanov A. V.
Заглавие : An update on inert anodes for aluminium electrolysis
Место публикации : Non-Ferrous Met. - 2020. - Vol. 48, Is. 1. - P.15-23. - ISSN 20720807 (ISSN), DOI 10.17580/nfm.2020.01.03
Примечания : Cited References: 62. - The work is performed as a part of the state assignment for the science of Siberian Federal University, project number FSRZ-2020-0013. Use of equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” is acknowledged
Аннотация: This update includes the literature related to the inert anodes which were published in the past decade. The metallic anodes are widely regarded as promising candidates to replace the carbon anodes due to its attractive properties like good electrical conductivity, easy to manufacture and high resistance to high thermal shocks. The metals have been tested in pure state and alloy (binary, ternary) form. The oxide scale formed on the anode surface acts as a barrier between the electrolyte and the anode, which protects the anode from being dissolved. The layer of molten fluorides is formed between the scale and the metal anode after a certain time of polarization, and the oxide scale acts as a bipolar electrode. Metal like Cu is reduced at the internal side of the scale. This paper elaborates the effects of various parameters on the performance of the anode. Cu-based alloys (Cu – Ni – Fe and Cu – Al) have shown promising results and could perform well in low-temperature electrolytes. It has been well established that the Cu content in Cu – Ni – Fe and Cu – Al alloys plays a major role in the metal dissolution as the CuO/Cu2O scales formed on the outer layer act as a sacrificial one. The corrosion rate of an anode can be reduced by decreasing the operating temperature, which is possible by using the KF – AlF3 melts. The use of suspensions can increase the purity of the produced metal by stop-ping the anode products to come in contact with cathode metal. Many industries including RUSAL and ELYSIS are still conducting a considerable amount of research to develop an inert anode and are expecting to have a carbon-free cell in the nearest future.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balaev D. A., Prus A. G., Shaikhutdinov K. A., Petrov M. I.
Заглавие : Angular dependence of the magnetoresistance in Y3/4Lu1/4Ba2Cu3O7-CuO composites at 77 K
Разночтения заглавия :авие SCOPUS: Angular dependence of the magnetoresistance in Y3/4Lu 1/4Ba2Cu3O7-CuO composites at 77 K
Место публикации : Tech. Phys. Lett.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2006. - Vol. 32, Is. 8. - P677-679. - ISSN 1063-7850, DOI 10.1134/S1063785006080128
Примечания : Cited References: 16
Предметные рубрики: CERAMIC SUPERCONDUCTORS
MAGNETIC-FIELD
MICROSTRUCTURE
BOUNDARIES
TRANSPORT
MOTION
FILMS
Аннотация: The angular dependence of the magnetoresistance of polycrystalline Y3/4Lu1/4Ba2Cu3O7-CuO composites has been studied. These composites represent a system of Josephson junctions and exhibit a large magnetoresistance at 77 K. In addition to the isotropic component, there is the angle-dependent component proportional to sin(2)theta, where theta is the angle between the directions of current and magnetic field. This behavior is unambiguous evidence for the process of flux flow in the Josephson medium realized in the composites.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Wu, Yanzheng, Li, Weiqiang, Zheng, Yifan, Xu, Yiqin, Wen, Dawei, Molokeev M. S., Pan, Zaifa
Заглавие : Apatite oxynitride phosphor (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+: A single-phased host with solar-like and efficient emission
Место публикации : J. Am. Ceram. Soc. - 2023. - Vol. 106, Is. 5. - P.2985-2996. - ISSN 00027820 (ISSN), DOI 10.1111/jace.18981. - ISSN 15512916 (eISSN)
Примечания : Cited References: 35. - This work was supported by the National Natural Science Foundation of China (Project No. 10804099, 21804119), Key projects of Zhejiang Natural Science Foundation (Project No. LZ18B050002), GDAS’ Project of Science and Technology Development (Nos. 2021GDASYL-20210103069, 2021GDASYL-20210103071)
Аннотация: During pursuing high color rendering index for full-color-emitting phosphor, low quantum efficiency (QE) is usually accompanying. We intend to elevate the luminescence efficiency when realizing a solar-like spectra distribution, by constructing apatite structure oxynitride, inheriting high covalence and rigidity from oxynitride, and suitable multiple cation sites from oxyapatite compounds. Full-color-emitting apatite structure oxynitride phosphor (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+ has been prepared, and the crystal sites’ occupancies of activators in this host were favorable for white emission. (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+ phosphor shows whole visible light with emission wavelength ranging from 370 to 750 nm, matching the spectra of sunlight quite well. The fabricated white light-emitting diode lamp demonstrated the distinctive overall performance of QE and chromaticity properties (Ra and R9). Furthermore, correlated color temperature is tunable from cool nature to warm white. The obtained lamp possesses the feature of less blue light hazard and high saturation of red degree, compared with the commercial YAG-based lamp.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Balyzin M., Sadrieva Z., Belyakov M. A., Kapitanova P., Sadreev A. F., Bogdanov A.
Заглавие : Bound state in the continuum in 1D chain of dielectric disks: Theory and experiment
Коллективы : International Conference on Metamaterials and Nanophotonics
Место публикации : J. Phys. Conf. Ser. - 2018. - Vol. 1092: 3rd International Conference on Metamaterials and Nanophotonics, METANANO 2018 (17 - 21 September 2018). - Ст.012012. - , DOI 10.1088/1742-6596/1092/1/012012
Примечания : Cited References: 11. - This work is supported by RSF (17-12-01581)
Ключевые слова (''Своб.индексиров.''): 1-d chains--bound state--ceramic disks--dielectric disks--ghz frequencies--material loss--quadratic growth--zero angular momentum
Аннотация: In this work we experimentally observe a symmetry protected optical bound state in the continuum (BIC) with zero angular momentum in 1D array of ceramic disks at GHz frequencies. We analyze the dependence of Q factor of BIC on the number of the disks and the level of the material losses. We confirmed theoretical prediction about quadratic growth of the Q factor with the number of the disks and its following saturation due to material losses.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Drokin N. A., Kiiko V. S., Pavlov A. V., Malkin A. I.
Заглавие : BT-30 Ceramic Electrophysical Properties
Место публикации : Refract. Ind. Ceram. - 2020. - Vol. 61, Is. 3. - P.341-348. - ISSN 1083-4877 (ISSN), DOI 10.1007/s11148-020-00484-2. - ISSN 1573-9139 (eISSN)
Примечания : Cited References: 12
Аннотация: A total complex resistance (impedance) method is used to study the electrophysical characteristics of (BeO + TiO2)-ceramics modified with TiO2 micro- and nanoparticles in an amount of 30 wt.% (BT-30). Dispersion of the actual ε′ and imaginary ε′′ components of the dielectric permittivity component and specific conductivity in the frequency range from 100 Hz to 100 MHz from room temperature to the boiling point of liquid nitrogen are determined. High values of ε′ and ε′′ in the low-frequency range are typical for structurally inhomogeneous materials due to the accumulation of electric charges at the surface and within microcrystals. Two dielectric relaxation processes associated with electrical conductivity within the body and at the surface of ceramics are detected for the first time. An increase in conductivity with an increase in the microwave field frequency above 1 MHz is explained by the appearance of a current relaxation component. The activation energy of the static resistance of ceramic specimens is determined as a function of the reciprocal temperature that depends little on the weight content of TiO2 nanoparticles and varies in the range of 0.024 – 0.10 eV This also confirms the existence of two independent conduction processes, weakly dependent on the nanoparticle content in the ceramic composition. With placement of ceramic in a high-frequency electric field, spatial charges are formed, the field of which contributes to creation of additional polarization and dielectric losses.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fomenko E. V., Akimochkina G. V., Anshits A. G., Fadeeva N. P., Kharchenko I. A., Elsuf’ev E. V., Shabanova K. A., Maksimova A. A., Ryzhkov I. I.
Заглавие : Ceramic substrates for filtration membranes based on fine fly ash microspheres
Колич.характеристики :13 с
Место публикации : Membr. Membr. Technol. - 2024. - Vol. 6, Is. 2. - P.71-83. - ISSN 25177516 (ISSN), DOI 10.1134/S2517751624020033. - ISSN 25177524 (eISSN)
Примечания : Cited References: 58. - The work was carried out with the support of the Russian Science Foundation, project no. 23-19-00269, using the equipment of the Krasnoyarsk Regional Center for Collective Use at the Krasnoyarsk Federal Research Center of the Siberian Branch of the Russian Academy of Sciences
Аннотация: A procedure has been proposed for producing ceramic substrates for filtration membranes based on a narrow fraction of fine fly ash microspheres using cold uniaxial pressing followed by high-temperature firing. It has been shown that increasing the sintering temperature from 1000 to 1150°C leads to a decrease in open porosity from 40 to 24%, a decrease in the average pore size from 1.60 to 0.34 μm, and an increase in the compressive strength from 9.5 to 159 MPa. The resulting substrates are characterized by water permeability values of 1210, 310, 240, 170 L m−2 h−1 bar−1 at sintering temperatures of 1000, 1050, 1100 and 1150°C, respectively. Experiments on filtration of aqueous suspensions of fine microspheres (dav = 2.5 µm) and microsilica (dav = 1.9 μm) through a substrate produced at a sintering temperature of 1150°C have shown the rejection close to 100%. The proposed methodology for using ash waste in the production of membrane materials promotes the development of technologies for the integrated processing of thermal energy waste.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mikhaleva E. A., Gorev M. V., Bondarev V. S., Bogdanov E. V., Flerov I. N.
Заглавие : Comparative analysis of elastocaloric and barocaloric effects in single-crystal and ceramic ferroelectric (NH4)2SO4
Место публикации : Scripta Mater. - 2021. - Vol. 191. - P.149-154. - ISSN 13596462 (ISSN), DOI 10.1016/j.scriptamat.2020.09.030
Примечания : Cited References: 47. - The reported study was supported by the Russian Science Foundation (project no. 19-72-00023 ). X-ray and dilatometric data were obtained using the equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS”
Аннотация: We report the influence of anisotropy and texture on elasto(ElCE)- and baro(BCE)-caloric effects in single-crystal and ceramic (NH4)2SO4. Inverse extensive and intensive ElCE in ceramics, (ΔSElCE)cer = 87 J/kg·K; ΔTAD = - 11.6 K), as well as in a single crystal along the ferroelectric axis a, (ΔSElCE)a = 115 J/kg·K; (ΔTAD)a = - 16 K, significantly exceed BCE, ΔSBCE = 75 J/kg·K; ΔTAD = - 9.8 K, even at low pressure ~ 0.3 GPa. Caloric parameters of ammonium sulphate are comparable with those for promising solid-state refrigerants.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Dedova E. S., Pertushina M. U., Kondratenko A. I., Gorev M. V., Kulkov S. N.
Заглавие : Complex oxide with negative thermal expansion for producing ceramic matrix composites with invar effect
Коллективы : International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016
Место публикации : AIP Conf. Proc. - 2016. - Vol. 1783: Advanced materials with hierarchical structure for new technologies and reliable structures 2016. - Ст.020037. - , DOI 10.1063/1.4966330
Примечания : Cited References: 12. - The research was conducted with partial financial support by an agreement with the Ministry of Education No. 14.575.21.0040 (RFMEFI57514X0040). Authors are grateful to Institute of Physics for their help in the dilatometer investigation.
Ключевые слова (''Своб.индексиров.''): ceramics--zirconium tungstate--negative thermal expansion coefficient--phase transformation--spinel
Аннотация: The article investigates the phase composition of (Al2O3 – 20 wt % ZrO2)–ZrW2O8 ceramic composites obtained by cold-pressing and sintering processes. Using X-ray analysis it has been shown that composites mainly have monoclinic modification of zirconium dioxide and orthorhombic phase of aluminum oxide. After adding zirconium tungstate the phase composition of sintered ceramics changes, followed by the formation of tungsten-aluminates spinel such as Alx(WOy)z. It has been shown that thermal expansion coefficient of material decreases approximatly by 30%, as compared with initial ceramics.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pavlov A. V., Kveglis L. I., Saprykin D. N., Nasibullin R. T., Kalitova A. A., Velikanov D. A., Nemtsev I. V., Kantai N.
Заглавие : Emergence of ferromagnetism in nanoparticles of BeTiO3 ceramic with the perovskite structure
Место публикации : Inorg. Mater.: Appl. Res. - 2021. - Vol. 12, Is. 1. - P.88-93. - ISSN 20751133 (ISSN), DOI 10.1134/S2075113321010330
Примечания : Cited References: 21. - The part of the work involving calculations was supported by the Russian Science Foundation (grant no. 18-19-00268)
Аннотация: Emergence of ferromagnetism and an increase in the electrical conductance of BeTiO3 beryllium ceramic with the perovskite structure were discovered experimentally. To explain the reason for appearance of the metallic properties, models are proposed, and calculations of the electronic structure of nanoclusters with different short-range order are performed.
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